Car-floor.



. F. M. BRINCKERHOFF.

CAR FLOOR.

APPLICATloN FILED SEPT. 15. 1914.

Patented Apr. 4, 1916.

um'rED srarns Parana onirica.

FRNOIS M. BRINCKERHOFF, OF ENGLEWOOD, NEW JERSEY, ASSIGNOR TO TEEELLCONCOMPANY, 0F NEW YORK, N. Y., A CORPORATION OF NEW YORK.

CAR-FLOOR.

Specification of Letters Patent.

Patented apr. a, 1ere.

Application led September 15, 1914. Serial No. 861,761.

` To all whom t may concern Be it known that I, FRANCIS MCFARLANBRINCKERHOFF, a citizen of the United States, and a resident of the cityof Englewood, Bergen county, State of New Jersey, have invented new anduseful Improvements in Car-Floors, of which the following is aspecication. .4

This invention relates broadly to railway car construction andparticularly to a floor' thus tending to prevent the transmission ofheat through the floor or wall construction.

Another object of this invention is to provide a fire proof car floorcapable of withstandinof stress and vibration without separating thecomponent parts thereof.

Another object of this invention is to provide a car floor with arelatively inelastic wear surface supported upon a relatively elasticsub-strata adapted to cushion lshocks and stresses.

A further object of this invention is to construct a car floor, or sidewall, of fire proof material having a composition wear surface whereinthe component parts inter- 'lock and are secured together to withstandstress and vibration without damaging or separating the various elementsthereof.

A still further object of this invention is to produce aself-sustainingcar wall or fioor structure of great strength, and havingthe binding members embedded within the structure in such manner as toeffectively bind the parts together and at the same time provide asmooth wear surface.

Still other and further objects of this invention will in part beobvious, and will in part be pointed out in the'speciication hereinafterfollowing by reference to the accompanying drawings wherein likecharacters are used to represent like parts throughout the severalfigures thereof.

Figure 1 is a view showing a cross section Aof the preferred form of myinvention wherein the attaching members are entirely concealed withinthe structure. Fig. 2 is a detailed perspective view. Fig. 3 is a Viewof my invention illustrating attaching members passing through one faceof the floor. Steel being afgood conductor of heat has made it necessaryto provide the walls of steel cars with heat insulation. To make theheat insulation most effective it should be in thel form of a continuousmember or layer of the side wall or car floor. Furthermore intheconstruction of steel cars'it is desirable that as much as possibleof the shops to produce a steel frame car having.

wood trimmings,.as compared with the production cfa steel car having nowood in its structure. To obviate difficulties various forms of sidewalls vand oors have been produced, including metallic structures.` Ametallic side Wall or partition is a good conductor of heat and thiscauses a ear so constructed to be hot in summer and cold in winter,thereby requiring the use of some particular form of heat insulation, asa separate element. A metallic surface is not a desirable surface for acar floor, and a Wood iioor is not suitable for reasons above stated;and as a matter of fact under many conditions cars having anjr wood intheir construction are absolutely prohibited from being used, as forexample in subway systems. To solve the problem of car 'iioors varioustypes of constructions have been devised, and experience shows thepreferred construction to be some form of fire proof l compositionsupported by a metallic backing. A car floor or side wall is subjectedto extreme vibrations and stresses in all directions. This being so,difiiculty has been found "in effectively securing the compositematerial to the metallic backing and at the same time also producing aneffective heat insulation.

- My invention which will yhereinafter be described in detail, relatesto a car side Wall, or more particularly to a car floor, lwherein thecar floor comprises a metallic backing, carrying keystone anchoringmembers upon which rests a layer of heat insulation material and overIwhich is secured, by submerged securing devices, a facing, a Wearsurface of composite material. The heat insulation in my inventioncomprises a continuous diaphragm of heat resisting material interposedbetween the metallic backing, or steel supporting members with itsfilling material, and the facing or hard Wearing surface. This type ofconstruction is very effective in preventing the transmission of heatbetween the opposite faces of the car floor or Wall. The various partsare also so constructed and interlocked together that the heatinsulating material forms a cushion which absorbs and takes up a largeamount of the vibration stresses which heretofore have tended to breakdown structures of this character, and at the same time provides abacking or substrata of sufficient elasticity to maintain the parts intheir proper relation. more my invention includes the use of means fortying together the keystone, or supporting strips, with the facing orWear surface in such a manner that the Wear surface is substantially andeffectively supported by the keystone members.

Referring more particularly to the drawings, the preferred form of myfioor or partition includes a supporting element comprising a corrugatedsteel plate l, preferably of the type known in the art as the KeystoneThe depending corrugations are preferably filled, With an inelasticfiller, such as cement 2, up to at least the level of the upper surfaceof the adjacent corrugations, thereby making the upper part of thesub-Hoor substantially a level surface and providing the sub-Hoor Withstrips of supporting material of a keystone cross section interlocked inthe metallic supporting element. Heat insulating material 4, is arrangedto constitute the next layer of the floor and is securely attached tothe supporting element by suitable means, which tie the Wear surface tothe sub-floor. In my preferred form these means constitute screw bolts 5Which pass through the heat insulation material and into nuts, which areembedded at predetermined intervals in the filler 2. The nuts may be ofthe cylindrical stepped type as is illustrated by the nut 6, or of theconical type as illustrated at 7, Fig. 1. In both cases it is preferablethat Furtherthe exterior of the periphery of the nut be provided Withoutstanding ribs 8 to insure against rotation of the nut When the boltis being screwed in position. The heads of the bolts are seated indished Washers 9. Under certain conditions ordinary screws Without thenuts may be sufcient as a securin means, as for example, the screwillustratecgl as at 10, Fig. l. By the foregoing specified arrangementit will be noted that the heat linsulating material which may be hairfelt, lime felt, fiax felt, or other suitable material, is securelyattached to the filler, or anchor bars, of cement or composition, laidin the keystone corrugations. The Wear surface, preferably composed ofsuitable cementitious composition 3,- as for example, fiexolith, isspread over the heat insulating material 4 in a plastic state .and insuch manner that it extends under the dished Washers 9 so that they aresecurely embedded therein. As the composition wear surface 3 hardens itsecurely grips the dished Washers and it will be noted that the entireWear surface is then securely tied to the supporting element .by meansof the submerged dished Washers and the securing bolts or screws. Itwill be seen that this construction produces a car Hoor of substantiallya unitary structure, composed of several elements tiedtogether in suchmanner as to admit of sufficient flexibility and cushioning to preventvinjurious effects due to shocks or vibration.

(Fig. 3 illustrates a modification of m structure, in which throughbolts 11 termlnate in valleys 12 and are provided with nuts 14, whichare 'seated against fiat Washers 15. In .this construction it Will benoted that the composition wear surface is securely tied to thesupporting steel plate both by the keystone supporting ribs and by thethrough bolts 11, which pass through and support the valley portions ofthe sub-fioor member. This construction is very strong and is moreespecially adapted for car side construction Where great strengthagainst lateral vibrations is demanded.

Having thus described my invention what I desire to claim is:

l. A car fioor structure of the character described including incombination a corrugated metal plate, across section of the corrugationscomprising truncated triangles, cement strips filling the corrugationsto provide asubstantially smooth surface, layers of heat insulationmaterial upon said smooth surface, a composition cement facing coveringsaid heat insulating material, screw bolt fastening members passingthrough said heat insulating material and into said cement strips, andanchoring devices within said composition cement facing and secured tosaid screw bolts to anchor said cement facing securely in position overthe heat insulating material.

2. A car floor including in combination a corrugated metallic sub-Hoor,cement bars interlocked with said sub-Hoor and filling said corrugationsto form a substantially smooth surface, a cushion of heat insulatingmaterial upon said smooth surface, a composition floor covering saidheat insulating material, and fastening means having a portion submergedin said composition fioor and another portion secured in said cementbars.

3. In a car ioor in combination a metallic sub-floor provided withcorrugations the cross section of which comprise truncated triangles;supporting strips filling the valleys on the upper sidel of saidmetallic subioor to produce substantially a smooth surface; heatinsulating material covering said smooth surface, a composition cementfloor resting on said heat insulation; and fastening means passingthrough said heat insulation, having one end thereof submerged in saidcement filling and the other end thereof attached to said supportingstrips.

4. A car floor including in combination a metallic sub-licor providedwith corrugations adapted to form grooves having overhanging portionssupporting strips Within said grooves and extending from Wall to Wallthereof, heat insulation material over said sub-oor, a composition Wearsurface upon said heat insulation, and fastening means extending fromWithin said composition flooring and secured to said supporting strips.

5. A car fioor including in combination a metallic sub-licor, supportingmembers interlocked With said metallic sub-floor, heat insulationcomprising a cushioning material over said supporting members and saidsub floor, a composition Wear surface over said heat insulationmaterial, and interlocking members for securing said composition wearsurface to said supporting members.

6. A ca1` Hoor including in combination, a

metallic sub-Hoor provided With grooves of dovetailed cross section,interlocking strips substantially lilling certain of said grooves andextending from Wall to Wall thereof, a

fiat heat insulating diaphragm laid over said sub-oor and interlockingstrips, a composition Wear surface supported on said heat insulating'diaphragm, and means secured to said interlocking strips and terminatingwithin the Wear surface to secure the metallic sub-floor and thecomposition Wear surface together.

7. In a car construction in combination a corrugated sheet metal or Hoormember, Ineans filling certain of said corrugations, a hard Wearingsurface, a continuous fiat diaphragm of heat insulating material betweenthe sheet metal member and the Wear surface, and means to secure thesaid parts together.

8. In a car construction in combination a sheet metal or ioor member, ahard Wearing surface, a continuous iiat diaphragm of heat insulationbetween said sheet metal member and the Wearing surface, and fasteningmeans interlocked with one surface of said steel supporting member andterminating beneath said Wearing surface to secure the parts together.

9. In acar floor in combination a steel supporting sheet, an upper hardWearing surface, a substantially flat continuous diaphragm of heatinsulation between the steel supporting sheet and the Wearing surface toprevent the transmission of heat through the said door, and fasteningmeans interlocked with one surface of said steel supporting member andterminating beneath said Wearing surface to secure the parts together.

10. In a car construction in combination a sheet metal member formedwith corrugations, a filler filling the corrugations on one side of saidsheet, a relatively thick cushion extending over the filler to provide arelatively elastic layer of material, a composition Wear surfacecovering said cushion and securing means extending between said sheetand said Wear surface and passing through said cushion.

renners M. namensnnorr.

Witnesses:

GEORGE W. RAMSEY, FRANCES MCCANN.

